Rapid Epitaxial Growth of Ag on Au Nanoparticles: From Au Nanorods to Core-Shell Au@Ag Octahedrons

2010 ◽  
Vol 16 (19) ◽  
pp. 5558-5563 ◽  
Author(s):  
Ana Sánchez-Iglesias ◽  
Enrique Carbó-Argibay ◽  
Arnaud Glaria ◽  
Benito Rodríguez-González ◽  
Jorge Pérez-Juste ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Au Nanorods

scholarly journals Epitaxial Growth of Ordered In-Plane Si and Ge Nanowires on Si (001)

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 788
Author(s):  
Jian-Huan Wang ◽  
Ting Wang ◽  
Jian-Jun Zhang
Keyword(s):  
Electron Microscopy ◽  
Epitaxial Growth ◽  
Molecular Beam ◽  
Core Shell ◽  
High Quality ◽  
Quantum Devices ◽  
Wafer Scale ◽  
Transmission Electron ◽  
Controllable Growth

Controllable growth of wafer-scale in-plane nanowires (NWs) is a prerequisite for achieving addressable and scalable NW-based quantum devices. Here, by introducing molecular beam epitaxy on patterned Si structures, we demonstrate the wafer-scale epitaxial growth of site-controlled in-plane Si, SiGe, and Ge/Si core/shell NW arrays on Si (001) substrate. The epitaxially grown Si, SiGe, and Ge/Si core/shell NW are highly homogeneous with well-defined facets. Suspended Si NWs with four {111} facets and a side width of about 25 nm are observed. Characterizations including high resolution transmission electron microscopy (HRTEM) confirm the high quality of these epitaxial NWs.

scholarly journals A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 867
Author(s):  
Lin Guo ◽  
Zhu Mao ◽  
Sila Jin ◽  
Lin Zhu ◽  
Junqi Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Absorption Bands ◽  
Au Nanorods ◽  
The Core ◽  
Band Position ◽  
Surface Enhanced Raman ◽  
Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

The Stabilization of Supported Au Nanoparticles in a Highly Sintering Environment using High Surface Free Energy Pt and Ru Cores

2021 ◽  
Author(s):  
Kerry O-Connell ◽  
John R Monnier ◽  
John Regalbuto
Keyword(s):  
Gold Nanoparticles ◽  
Free Energy ◽  
Surface Free Energy ◽  
Au Nanoparticles ◽  
High Surface ◽  
Chemical Environment ◽  
Core Shell

In an effort to stabilize gold nanoparticles which sinter rapidly in a highly corrosive chemical environment, the hydrochlorination of acetylene, bimetallic Ru@Au and Pt@Au core-shell catalysts were prepared by anchoring...

scholarly journals Magneto-Optical Characteristics of Streptavidin-Coated Fe3O4@Au Core-Shell Nanoparticles for Potential Applications on Biomedical Assays

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chin-Wei Lin ◽  
Jian-Ming Chen ◽  
You-Jun Lin ◽  
Ling-Wei Chao ◽  
Sin-Yi Wei ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Faraday Effect ◽  
Au Nanoparticles ◽  
Optical Characteristics ◽  
Enzyme Linked Immunosorbent Assay ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Time Resolved ◽  
Biotechnology Research ◽  
Core Shell Nanoparticles

Abstract Recently, gold-coated magnetic nanoparticles have drawn the interest of researchers due to their unique magneto-plasmonic characteristics. Previous research has found that the magneto-optical Faraday effect of gold-coated magnetic nanoparticles can be effectively enhanced because of the surface plasmon resonance of the gold shell. Furthermore, gold-coated magnetic nanoparticles are ideal for biomedical applications because of their high stability and biocompatibility. In this work, we synthesized Fe3O4@Au core-shell nanoparticles and coated streptavidin (STA) on the surface. Streptavidin is a protein which can selectively bind to biotin with a strong affinity. STA is widely used in biotechnology research including enzyme-linked immunosorbent assay (ELISA), time-resolved immunofluorescence (TRFIA), biosensors, and targeted pharmaceuticals. The Faraday magneto-optical characteristics of the biofunctionalized Fe3O4@Au nanoparticles were measured and studied. We showed that the streptavidin-coated Fe3O4@Au nanoparticles still possessed the enhanced magneto-optical Faraday effect. As a result, the possibility of using biofunctionalized Fe3O4@Au nanoparticles for magneto-optical biomedical assays should be explored.

Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic Accessibility

1997 ◽  
Vol 119 (30) ◽  
pp. 7019-7029 ◽  
Author(s):  
Xiaogang Peng ◽  
Michael C. Schlamp ◽  
Andreas V. Kadavanich ◽  
A. P. Alivisatos
Keyword(s):  
Epitaxial Growth ◽  
Core Shell

Polymer-assisted synthesis of aligned amorphous silicon nanowires and their core/shell structures with Au nanoparticles

2004 ◽  
Vol 397 (1-3) ◽  
pp. 128-132 ◽  
Author(s):  
Xing-bin Yan ◽  
Tao Xu ◽  
Shan Xu ◽  
Gang Chen ◽  
Qun-ji Xue ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Silicon Nanowires ◽  
Au Nanoparticles ◽  
Shell Structures ◽  
Core Shell

Epitaxial Growth of ZSM-5@Silicalite-1: A Core–Shell Zeolite Designed with Passivated Surface Acidity

ACS Nano ◽  
2015 ◽  
Vol 9 (4) ◽  
pp. 4006-4016 ◽  
Author(s):  
Arian Ghorbanpour ◽  
Abhishek Gumidyala ◽  
Lars C. Grabow ◽  
Steven P. Crossley ◽  
Jeffrey D. Rimer
Keyword(s):  
Epitaxial Growth ◽  
Surface Acidity ◽  
Core Shell

Synthesis of Controllable-Size Core–Shell Se@Ag and Se@Au Nanoparticles in UV-Irradiated TSA Solution

2007 ◽  
Vol 2007 (8) ◽  
pp. 1128-1134 ◽  
Author(s):  
Liangbao Yang ◽  
Yuhua Shen ◽  
Anjian Xie ◽  
Jianjun Liang ◽  
Jinmiao Zhu ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Core Shell ◽  
Controllable Size

scholarly journals Direct Imaging of Core-shell Structure in Ag-Au Nanoparticles

2005 ◽  
Vol 11 (S02) ◽  
Author(s):  
Z Y Li ◽  
J Yuan ◽  
Y Chen ◽  
R Palmer ◽  
J Wilcoxon
Keyword(s):  
Shell Structure ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Direct Imaging ◽  
Core Shell Structure
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